The city of Dumai in Indonesia is set to issue the highest level of alert after haze from forest fires engulfed the city, Antara News reported.

Dumai Deputy Mayor Agus Widayat said the region's air quality has degraded to a level that can threaten residents' health. Mr. Widayat asked people to "stay indoors and use face masks if they have to venture outdoors" so as to prevent any respiratory problems.